Regular vs hi-def video projectors

[mpalmer12345]

I have a fairly old video projector that can project a 1280x720 Quicktime movie from my laptop through XGA-out (or DVI) at what appears to be full resolution. Why is that not considered hi-def, and what is the difference between this and what I would see with a hi-def projector?

 

[HBlack]

If the laptop is designed for standard def projection, it's not projecting it at full resolution. If it seems fine to you, then stick with it. However, an HD projector should be noticeably sharper when projecting on a larger area.

 

[mpalmer12345]

So if a projector says it can project 1024x768 pixels of resolution, what's happening when I project a Quicktime movie with my laptop at that resolution, and why isn't that considered hi-def?

This one, for instance:

http://www.bhphotovideo.com/c/product/416137-DEMO/Sanyo_PLCXF35N_DEMO_PLC_XF35N_XGA.html